US2740706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing metal oxides
Assignee: Texaco Development Corp
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Filing: 1951-10-10
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Granted: 1956-04-03
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Expires: 1971-10-10
Abstract
No abstract record available.
Inventors
- 👤 Peter L Paull
- 👤 Sellers Frederick Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:06
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; C01; C01B; C01B3/00; C01B3/02; C01B3/22; C01B3/32; C01B3/34; C01B3/36; C01B3/50; C01B2203/00; C01B2203/04; C01B2203/0465; C01B2203/0475; C01B2203/0485; C01B2203/0495; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A PROCESS FOR THE REDUCTION OF A METAL OXIDE WHEREIN A REDUCIBLE METAL OXIDE IS CONTACTED IN A DOWNWARDLY MOVING BED WITH AN UPWARDLY FLOWING STREAM OF REDUCING GAS COMPRISING CARBON MONOXIDE AND HYDROGEN WHEREBY THE METAL OXIDE IS REDUCED AND CARBON MONODIXE PARTIALLY CONVERTED TO CARBON DIOXIDE, A PORTION OF THE RESULTING GAS WITHDRAWN FROM AN INTERMEDIATE POINT IN THE BED, AND SUFFICIENT AIR INTRODUCED ABOVE SAID INTERMEDIATE POINT FOR COMBUSTION OF THE REMAINING GAS, THE IMPROVEMENT WHICH COMPRISES INTRODUCING A STREAM OF SUBSTANTIALLY PURE NITROGEN INTO SAID BED ABOVE SAID INTERMEDIATE POINT.
Claim 2
Dependent Claim
95 words
IN A PROCESS FOR THE REDUCTION OF A METAL OXIDE WHEREIN A REDUCIBLE METAL OXIDE IS CONTACTED IN A DOWNWARDLY MOVING BED WITH AN UPWARDLY FLOWING STREAM OF REDUCING GAS COMPRISING CARBON MONOXIDE AND HYDROGEN WHEREBY THE METAL OXIDE IS REDUCED AND CARBON MONODIXE PARTIALLY CONVERTED TO CARBON DIOXIDE, A PORTION OF THE RESULTING GAS WITHDRAWN FROM AN INTERMEDIATE POINT IN THE BED, AND SUFFICIENT AIR INTRODUCED ABOVE SAID INTERMEDIATE POINT FOR COMBUSTION OF THE REMAINING GAS, THE IMPROVEMENT WHICH COMPRISES INTRODUCING A STREAM OF SUBSTANTIALLY PURE NITROGEN INTO SAID BED ABOVE SAID INTERMEDIATE POINT.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |